Emergence of string-like physics from Lorentz invariance in loop quantum gravity

Abstract

We consider a quantum field theory on a spherically symmetric quantum space time described by loop quantum gravity. The spin network description of space time in such a theory leads to equations for the quantum field that are discrete. We show that to avoid significant violations of Lorentz invariance one needs to consider specific non-local interactions in the quantum field theory similar to those that appear in string theory. This is the first sign that loop quantum gravity places restrictions on the type of matter considered, and points to a connection with string theory physics.

Honorable mention Gravity Research Foundation 2014, 7 pages

References in corpus (3)

• Lorentz invariance and quantum gravity: an additional fine-tuning problem?
• Loop quantization of the Schwarzschild black hole
• Hawking radiation from a spherical loop quantum gravity black hole

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